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AssigneeIPG Microsystems LLC
InventorsJeffrey P. Sercel, Marco Mendes
Estimating the term…
An adjustable astigmatic elongated beam spot may be formed from a laser beam having ultrashort laser pulses and/or longer wavelengths to machine substrates made of a variety of different materials. The laser beam may be generated with pulses having a pulse duration of less than 1 ns and/or having a wavelength greater than 400 nm. The laser beam is modified to produce an astigmatic beam that is collimated in a first axis and converging in a second axis. The astigmatic beam is focused to form the astigmatic elongated beam spot on a substrate, which is focused on the substrate in the first axis and defocused in the second axis. The astigmatic elongated beam spot may be adjusted in length to provide an energy density sufficient for a single ultrashort pulse to cause cold ablation of at least a portion of the substrate material.
A method of forming an astigmatic elongated beam spot for machining a substrate, the method comprising:
The method of claiml wherein the substrate includes silicon.
The method of claiml wherein the laser beam is generated by a fiber laser.
A method of forming an astigmatic elongated beam spot for machining a substrate, the method comprising:
Dependencies are inferred from the claim text.